| 摘要 |
There is disclosed a hydraulically-controllable variable pitch propeller device capable of being removably mounted on a propeller shaft. The device includes a rotatable mounting flange and a stationary hydraulic mechanism located between the mounting flange and the propeller hub. The hydraulic mechanism includes a cylinder and a piston. The device also includes means for varying the pitch of the propeller blades in response to movement of the piston within the cylinder. The varying means includes a thrust face cooperating with a face of the piston, both the thrust face and piston face having mating races in which ball bearings are mounted. The device also includes a novel control mechanism for regulating the amount of hydraulic fluid in the hydraulic cylinder for controlling the location of the piston and thus the pitch of the propeller blades.
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